'Zombieland' director doubts sequel will happen

The 2009 film starred Woody Harrelson, Jesse Eisenberg, Emma Stone and Abigail Breslin and was both a critical and commercial success. However, Fleischer has revealed that it is proving difficult to work around everyone's busy schedules.

"I can promise you it's something we all want to do," Fleischer told Coming Soon. "I think the reality of it happening is getting less and less real.

"It's just harder and harder every day because everybody's gotten really busy and the reality is that we've never had a script that we've all just fallen in love with. Until there's a script that we all can say, 'This is it', it's more of an idea than an actual thing that we can work towards prioritising and realizing."

Fleischer also said that even though he and the cast were keen to begin work on a sequel, it would be good to have a gap between the two films.

"It's not like it's going to pick up right where they left off," he added. "I think some time passage might be cool."

Fleischer is currently beginning pre-production on his new drama Gangster Squad starring Ryan Gosling, Josh Brolin and Sean Penn.